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Cummingtonite - Antrona Valley, Ossola Valley, Verbano-Cusio-Ossola Province, Piedmont, Italy
(#:MINS9298)
Cluster of Cummingtonite xls up to 4 cm long on matrix.
Formula :
(Mg,Fe
2+
)
74
O
1
]
2
System:
monoclinic
Hardness:
5-6
Rarity:
not common
Strunz id:VIII/F.7-20 - SILICATES
Name origin:
Cummingtonite was originally named in 1824 by Chester Dewey for the type locality in Cummington, Massachusetts, USA. Dewey (1824)
Specimen weight:100 gr.
Crystal size:Up to 4,0 cm
Overall size: 48mm x 47 mm x 30 mm
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2-(MI) - Miniature (Max 5.0 cm)
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